Holcobunus uaisoh, Tourinho, Ana Lúcia, Pinto-Da-Rocha, Ricardo & Bragagnolo, Cibele, 2015

Tourinho, Ana Lúcia, Pinto-Da-Rocha, Ricardo & Bragagnolo, Cibele, 2015, Taxonomic notes on Holcobunus Roewer, 1910, with descriptions of three new species, and new records for Holcobunus nigripalpis Roewer, 1910 (Opiliones: Eupnoi: Sclerosomatidae), Zootaxa 4027 (3), pp. 425-436 : 430-431

Holcobunus uaisoh sp.nov

Fig. 5–7

Etymology. “uai sô” is a popular expression from people of Minas Gerais State of Brazil, that has English origin, meaning and pronunciation of “Why so?”

Type locality. Brasil, Minas Gerais, Fervedouro, Parque Estadual Serra do Brigadeiro. Type Material. Male holotype, 4 females paratypes, 3 immatures ( MZSP 69117), M.B. daSilva & G.E. Kaneto leg., III.2006.

Distribution. Only known from the type locality ( Fig. 7 ).

Diagnosis. Males with body color black ( Fig. 5 A–C), females with light dorsal stripes and spots, eye mound with a pair of yellowish stripes ( Fig. 5 D–F). Femur, patella and proximal half of pedipalpal tibia black, distal half of tibia and tarsus cream, chelicerae cream ( Fig. 5 C and F). Eye mound armed with sharp granules. Femoral nodule formula: 2/5-6/2-3/2-3. Penis: Dorsal orifice of anterior shaft of penis lacking ( Fig.6 A and C).

Description. Male paratype: lengths: body: 2.65 mm, carapace: 0.81 mm, chelicera: 1.22 mm, pedipalps: 2.95 mm. Femora: 10.1/19.2/9.5/ 14.2 mm. Dorsal and ventral surface body surface reticulate. Supracheliceral lamina armed distally with one or two blunt tubercles on each lobe. Eye mound armed with two rows of 10 or more sharp granules ( Fig.5 C). Lateral margins of genital operculum armed with three-pointed sharp granules, arculi genitales II unarmed. Chelicerae: ventrobasal spine of basichelicerite blunt. Pedipalps: Femur armed with a ventral row of sharp pointed tubercles. Patella, including inner apophysis, armed with dorsolateral sharp pointed tubercles, inner apical apophysis longer than wide. Tibia armed with sharp tubercles. Tarsus unarmed. Legs: Femoral nodule formula: 2/5-6/2-3/2-3. Penis ( Fig. 6 ) similar to H. nigripalpis and H. dissimilis . Winglets longer than wide, narrower than shaft ( Fig. 6 A–B), ventral collar present but not very marked ( Fig. 6 B and D), shaft almost straight. Dorsal and ventral faces of glans not depressed, with two pairs of subapical setae ( Fig. 6 C–F). Stylus bent in ventral view ( Fig. 6 D).

Female paratype: lengths: body: 4.12 mm, carapace: 1.15 mm, chelicera: 1.4 mm, pedipalps: 2.9 mm. As in the male, except body swollen dorsoventrally and articular membrane isolating all sclerites ( Fig.5 D–F). Membrane very evident, widely surpassing sclerites ( Fig. 5 E).

Figures

FIGURE 5. Holcobunus uaisoh sp. nov. Male holotype: A, dorsal view; B, ventral view; C, lateral view. Female paratype: D, dorsal view; E, ventral view; F, lateral view; Scale bars = 0.5 mm.

FIGURE 6. Holcobunus uaisoh sp. nov. Male genitalia: A, dorsal view (scale bar = 100 µm); B, ventral view (scale bar = 100 µm); C, lateral view (scale bar = 100 µm); D, detail of glans (scale bar = 20 µm); E, detail of apex (scale bar = 2 µm).

FIGURE 7. Distribution records of Holcobunus species.